One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,14,18,38)(4,20,23,9)(5,24)(6,11)(7,12)(8,17,31,19)(10,26)(13,28)(15,40)(16,45,46,30)(21,50,53,55)(22,34,54,33)(25,56,47,35)(27,36)(29,42)(32,52,49,64)(37,57)(39,44)(41,58)(43,48)(51,59)(60,61)(62,63)(1,3)(2,8)(4,15)(5,25)(6,19)(7,18)(9,29)(10,35)(11,38)(12,31)(13,14)(16,26)(17,28)(20,48)(21,51)(22,43)(23,44)(24,45)(27,47)(30,36)(32,59)(33,40)(34,39)(37,56)(41,52)(42,54)(46,57)(49,60)(50,58)(53,61)(55,63)(62,64) involution — undirected(1,4,6,22,7,23,28,54)(2,9,11,33,12,20,13,34)(3,15,17,42,18,44,19,43)(5,21,26,52,27,53,57,64)(8,29,14,39,31,48,38,40)(10,32,36,50,37,49,24,55)(16,41,25,51,46,62,47,61)(30,58,35,59,45,63,56,60)(1,5,6,26,7,27,28,57)(2,10,13,24,12,37,11,36)(3,16,17,25,18,46,19,47)(4,21,22,52,23,53,54,64)(8,30,38,56,31,45,14,35)(9,32,34,55,20,49,33,50)(15,41,42,51,44,62,43,61)(29,58,40,60,48,63,39,59)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.